21272139

素因数分解:

$3^4\times 7^1\times {\mathrm{37517}}^1$

素因数の和:37536

約数の個数: 20

約数和(自身を含む): 36317424

約数和(自身を除く): 15045285

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 37517, 112551, 262619, 337653, 787857, 1012959, 2363571, 3038877, 7090713, 21272139]

約数ペア:

[(1, 21272139), (3, 7090713), (7, 3038877), (9, 2363571), (21, 1012959), (27, 787857), (63, 337653), (81, 262619), (189, 112551), (567, 37517)]